HMD Image Blurring for VR Sickness Reduction
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Solution Overview
Problem
Existing methods for reducing visually induced motion sickness in virtual reality (VR) do not effectively address the synchronization of a user's visual field with the movement of a head-mounted display (HMD), leading to inadequate reduction of VR sickness, especially when the HMD's resolution increases.
Innovation Solution
A method that acquires the rotational direction and speed of the HMD, performs image information amount reduction processing by blurring, reducing contrast, and decreasing chromaticity, based on the displacement of the HMD, to generate an image with reduced information, thereby minimizing visual load and VR sickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the HMD resolution is increased to improve image quality, then the visual clarity is improved, but the visual load increases and VR sickness occurs
Solution Approach 1:
The patent applies different image information amounts to different regions of the display. The central region (fixation point area) maintains high image quality with normal resolution, while the peripheral regions apply reduced image information through blurring or lowering resolution. This local differentiation allows the system to provide high visual quality where the user's attention is focused while reducing overall visual load and preventing VR sickness.
2Object-affected harmful factors
If image information amount is reduced to decrease visual load, then VR sickness is reduced, but the image quality deteriorates
Solution Approach 1:
The patent selectively reduces image information only in specific peripheral regions while maintaining high quality in the central fixation region. This is achieved by calculating the angle between each pixel's normal vector and the user's line of sight, then applying different levels of image information based on this angular relationship. The result is optimal balance between reducing visual load and maintaining necessary image quality.
3Adaptability or versatility
If the HMD is moved to synchronize with user's visual field, then the immersion experience is improved, but the peripheral image quality deteriorates due to motion blur
Solution Approach 1:
The patent pre-calculates and pre-processes images with reduced information amounts in peripheral regions before displaying them during HMD movement. By preparing these regions in advance with appropriate blurring or resolution reduction, the system avoids the need for real-time image processing during motion, thereby preventing motion-induced quality deterioration while maintaining visual field synchronization.
Data Source
AI summary
A method including generating a virtual space image for displaying on a head mounted display (HMD). The method further includes acquiring a rotational direction and a rotational speed of the HMD. The method further includes subjecting the virtual space image to blurring processing based on the rotational direction and the rotational speed, the blurring processing being performed on end regions of the virtual space image on both sides of the virtual space image in a direction corresponding to the rotational direction, a size of the end regions corresponding to the rotational speed, and an intensity of blurring of the end regions corresponding to the rotational speed.